400303143 has 12 divisors (see below), whose sum is σ = 581560200. Its totient is φ = 265325136.

The previous prime is 400303103. The next prime is 400303151. The reversal of 400303143 is 341303004.

It is not a de Polignac number, because 400303143 - 2²⁰ = 399254567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400303103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126993 + ... + 130106.

It is an arithmetic number, because the mean of its divisors is an integer number (48463350).

Almost surely, 2^400303143 is an apocalyptic number.

400303143 is a deficient number, since it is larger than the sum of its proper divisors (181257057).

400303143 is a wasteful number, since it uses less digits than its factorization.

400303143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257278 (or 257275 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 400303143 is about 20007.5771396739. The cubic root of 400303143 is about 736.9923841209.

Adding to 400303143 its reverse (341303004), we get a palindrome (741606147).

The spelling of 400303143 in words is "four hundred million, three hundred three thousand, one hundred forty-three".